You can use FormsCentral itself for free, but the free service is very limited. In order to use the PayPal Express Checkout feature, you have to subscribe to a paid FormsCentral service.

PayPal, a service for sending and receiving money, today announced that it has brought its Express Checkout service to smartphones. Dubbed Mobile Express Checkout, the service will allow on-the-go ...

Can Online Checkout Get Any Quicker? PayPal Says Yes The fintech company partnered with Commercetools to give over 500 million users its accelerated checkout solution, Fastlane.